Motor-control system.



N0. 873,171. v l vP',|.V' HN'1'BD DEC. `j10, 1907.

A W. J. RICHARDS.

HO'I'B ONTROL SYSTEM.

urmonxol nu am. as. 1m;

WJ A

LUZ/@L4 Manning means for control the of the generator. motely controlled means for varying' and re STATES PATENT OFFICE.

WALTER J. RICHARDS, OF,

Nonwoon, o'mo, AssIGNoa To .A .LLIs-cmmnss ooMPANY, .i coaromTIoN 0F NEW :Enemy xml-00ml.

`lare. 873,171.

Ipecicatien of Lettera Patent.

Patented Dec. 10, 1 907.

um ma mi 2o. 100e. um l.. stesse.

To all whom' 'it may concern:

Be it known that I, Wanna 4J. Rlonanns, citizen of the United Statesz at Norwood, in the county of Hlmilton an State of Ohio, have invented certain new and useful Improvements in Motor-Control Systems, of which the following isa full, clear, and exact specification.

`My invention relates to motor control stems and especially to control systems or` `mill and hoisting motors.

In o rolling mills and mine: hoisting machinpgrryt in many other kinds of work, it is necessary that the wor motors be quickly and often reversed; y invention aims to obtain this result while avoiding the difficulties which prior electrical systemsv with the same object in view have encountered.

To this end my invention in one aspect consists in a motor control system comfpnsin a generator, a motor the armature o whic is' exclusively supplied by said generator and remotely controlled electrically operat electrmotive force isalso provided reversing the field of the motor.

Fromanother point of view my invention consists of a generator, a -motor sup lied thereby, opposing field windings for bot the generator and the motor, and means for ren- Amachine b f ap from the description and drawings and c wiiif ded claims.

pointed out in the ap Figure 1 represents one em invention; and Fig. 2 shows a modification. In 1 a neratorGsupliesaworkmg' motor T e generator has op series field win 10 and l1 `and the-motor o posingseriesedwindings 12 and 13.v In unt to the 10, 11, 12 and 13 are lctedinanydesired ,normally-open, solenoid-operated switches 1415, 16 and 17 respectively. The solenoi of these switches are controlled by switches 18, 19, 20 and 21 respectively, operp manner as by one or more master controllers. The eld windings 10', .11, 12 and 13 may alsol be s hunted by means of solenoid switches 22 and 23, 24 and 25, 26

and l27,and 28 and 29. When these switches# are closed they do not short-circuit their reective field windings but merely shunt s t em with one or more sections of resistance.

Thus the switches 22 and 24 when closed shunt their respective field windings by sistance. section 30, while switches 23 and 25 when'closed connect the resistance sections 3Q and 31 in shunt to 'their respective field wm Similarly the switches 26l and=28 -shunt eir associated eld windings 12 and 13 tively by resistance section 32, while f switc es 27 and 29 shunt said windings by both the resistance sections 32 and 33. A ny desired number of vthese switches and resistance sections may be lused. The circuits of the solenoids of switches 22 to 29 inclusive are controlled b switches 34A to 41 inclusive respectively. sive and 34 to 41 inclusiveare operated by These controllers are 'here shown as controlling the switches associated respectively with the erator and the motor. When the Ae switches 18 to 21 inclu- B0 one or more .master controllers, two such coni s vtrollers 42 and 43 beingshown in this shaft 44 or 45 of these controllers is turned, f

the cams 46 or 47 thereon operate the mas-v -ter controlling switches in any desired -manner the arrangement as shownin controller 42 such that the switches `14 25, and 24 are successively operated in named when the controller is moved in one direction from its central. or oif -posi-- tion, while the switches 15, 23 and 22 are successively operated in the order named when the controller is moved in the other the order.

direction. The master controller 43 simi larly completes the opera vcircuits ofthe switches Y16, 29 and 28 in e ordernamed when it is moved in one direction from its central position, and when moved in the otherV direction causes the successive operation of the switches 17, 27 and 26. This order of movement is not an essential the ventire the motor and'linclu'de in shunt thereto one .v l.o r'in'ore ofthe resistance sections 54, 55, I56v .and; 57'.' This resistance is onlyeiective as a regulatinig shunt to one ofeachpair of the op sing e fie dwinding at the time when this shunt 'i this figure theeldwindings 12"l land '-13- vwhiclizcontrol the motor, M are not wound" of my present invention and may be variedas desired. The controlling circuits are sup-v plied by batteriesv 48 and 49 though other sources of supply may be vused if desired.

6 By means ofthe system shown iii Fig. -1, v

In 2, instead of havingseparate sets of switches for varying the resistance in r'15 shunt to each motor or generator field windf ing a singleset of switches'50 and51 controis the resistance in shunt to both genera- 'tor eld win while another single set 52 and 53 contro s the resistance in shunt to 2 0 both motor field These switches connect togetherv the.- outside terminals of eld winding of the generator or ld"4 windings because the other circuit is' closed 'isalways shortecir'cuited by one'ofthe switche's14 tov 1 7 inclusive. In

f' directly on theeld frainef'f the motor M,

but instead' energize .the field for-anfexciter m 'driven inanydesired manner. y The ex- .l citer m sup lies4 the -ield winding 58 oi the motor, whic field varies inv proportion tothe variations of the exciter field stre generator field. The circuits of the solenoids `of. the switches 50 to 53 inclusive are controlled by switches459 to 62 inclusive. These solenoidsare here shown as supplied ter controller are all-operated by eccentrics mounted on the single shaft 64, thus allowing the motor -and generator circuits to be l controlled by a singlg controller. The order of operation may anydesired, and the ',operation of the system is fin general similar that described above Iin connection with FII have described my invention in what I now consider to be its preferred form but in the following claims I aim to cover allthose modifications which readily occur to one skilled in the art and which come within the spirit and scope of my invention. What I claim is'z- 6l) -1. In combination, afgenerator, a motor supplied thereby', oppos field .for bot the enerator an the' motor, and

means for s ort-circuiting one field on either machine. 0 5 2. vIn combination, a motor oppos .means or .8.1v `ingseries'"iie'ldwin' r tli. If` desired a similar exciter'ma be use for thel by a battery 63.- The switches of the massrari a generator for sup- Plymg wd' motor' an also @Posing series -eld windings and means for-short cirhicluiting either 'field 'on either'mac e y s 3. combination, a motor opposingseries-'ield win a generator for supplying said'motor'an also having opposing ing series eld "series field windings,. means for short-circuiting oneeld win on each achine '76 and means for regulatdilntheremainnil'ng field winding ofeacli machine; 4.v In combination, a generator ha vopposing series field win ,means for ortcircui' either of saidv eld windingsand s.

e ,"tingwheffiud 5. Incombination,'amotorhaving-opposing serieseld win ,'-a' generator for supplying said motorv an also-havingopposing series eld windings, means for short-circuiting either 'field on either machine, and means for shun .the remaining eldwinding ofeach machine by -v'ariable resistanc 90 l6.,*In combination, a generator ha I opposing series eld means for-s ort`l vcircuiting either of said fieldfwin and .means for shuntingl 'the fiel l'windingrb a'va'riablefre'sistan) f 7." combination, agenerator ha op-` posing series-ield means for s ortcircliitngfsblfll Qf'fd'eldwin' a11d vmeans' forshuntingthevxelnainiiig fiel windv afvaablefreeistance. Y 100 lfcferx' ibiniitioms a-motor having oppos- ,"a generator'for supplymgsaid motoran also having 'opposing serie"s eld` .means for short-circuiting 'onefield on.each/machine, 105 and'remotel controlled means'for regulating vthe effect'o Athe're'maining field winding of -eachmachme v A9. Incombination, agenerator ha opposing series -ieldwin ,means fdligortcircuitin'g either of'said ld windings', and remotelycontrolled 'means for regulating the f .remainin'giield 10. 'InjcombinationA a motor ha op'- posing series eldwin ',means fors ort-` vcircui either of said eld windings, and means ory regulating theremaiDin'g field 11. 'combination la motor ha 'op'- posing series eld means for s ort'- -120 circui one of said eidllwin'dings, and

,means or regulatingthe field 12'. combination 4a motor Iha opposing series field win ,means for ort- 125 circuiting either of said eld and means for shunting the remaining fiel windingby-a' variable resistance- `13. In comb' tiona motor ha 'op.v posing series field means for 'ortf' 18'0 wind' on either machine ine ective. c

16. a system of motor control, a generator, a motor lsiip lied thereby, opposing field windings for bot machines, means for rendering either field winding on either machine ineffective, and means for regulating the remaini field windings.

combination, a generator opposing series field windings, means for rendering either of said field windings ineffective,

and means for varying the effect of the remaining field' winding. 25

In Iitiinibinatioii, a dhyrlimo-:electric mac e ving opposing e windings means for denergizing either o f said fied windings, and means for r ating the effect of the rem field win 19. In combination, a dynamo-electi'ic machine having opposing fiel windings, and rerlxotel coreile rmeansdmgs fo'fden eit ero sai Win an orregu ting the remaining field Winding.'

20. In combination, a d mo-electric machine having opposing ld windings,

l solenoid switches for denergizing either of said field Wind' s, the remaining 1xibld winding. A

21. In combination, a d'namo-electric machine having differential eld windings, solenoid switches for rendering either of said -field windings ineffective, and solenoid switches for re ting the effect of the rema' field windings.

22 combination, a d amo-electric machine having differential eld windings solenoid switches for rendering either of sai field windings ineffective, solenoid switches for regulating the effect of the remaining field wind' and a master controller for all of said so enoid switches. c

23. A system of motor control, comprising a generator, a motor sup lied thereby, an opposing sei'ies field win for both the generator and the motor.

24. A system of motor'control, comprising a generator, a motor suppliedl thereby, opposing series .field windings for both the generator and the motor, and magnetically operated switches for short-circuiting either field Winding of leither machine.

25. A system of motor control, comprising a generator, a motor supplied thereby, op-

ineffective, v

and means for regulating posing series field windings for both the generator and the motor, magnetically operated switches for short-circuiting either field winding of either machine, and one or more master controllers for said switches.

26. A system of motor control, comprising a generator, a motor supplied thereby, opposing series field windings for both the generator and 'the motor,l etically o rated switches for short-circui -either field win of either machine, an lmeans for regulating the effect of the remaining field 27. system of motor control, comprising a generator, a motor supplied thereby, opposing series field windings for both the generator and the motor, magnetically o rated switches for short-circuitin either fi d winding of either machine, an ma netically operated switches for shunting ie remaining field windings by resistances.

28.' A system of motor control, comp a generator, a motor supplied thereby, op-Y posing series field windings for both the generator and the motor, magnetically o rated switchesfor short-circuitin eitherfi dwinding of either machine an erated switches for shunting t field windings by resistances of different values. y

29. A system of motor control, comprising etically opizing a generator, amotor supplied thereby, op-

posing series field windings for both the generator and the motor, magnetically o rated switches for short-circuiting either fi d windof either machine, magnetically operated switches I for shunting e remaming field windings by resistances, and one or more master controllers for all of said solenoid switches.

30. A system of motor control, comprising a generator, a motor supplied thereby, op-

posing series field windings for both the genl Aate erator and the motor, magnetically o switches for short-circiiiting either fi d windof either machine, m etically operated switches for shunting t e remaining field windings by resistances of different values; and one or more master controllers for all of said solenoid switches.

31. A motor control system comprising a generator, a motor the armature of which is exclusively supplied by said generator, and remotely controlled electrically operated means or controlling the electromotive force of said enerator. 4

32. motor control system comprising a motor, a generator suppl the armature thereof, and remotely contro ed means for v the field strengths of said motor and sai generator.

33. A motor control system comprising a generator, a motor the armature of which is exclusively supplied by said generator, and

motor, a generator supp yingjthe armature thereof, and electrically o erated means for varying the electromotive orce of said generator and the field stren th`of the motor.

36. Amotor contro system comprising a motor, a generator supplying the armature thereof, and electrically operated means for varying the electromotive force of the enerator and varying and reversing the fiel of the motor. d

37. A motor control system comprising a" generator, a motor the armature ofwhich is exclusively supplied by said enerator, and solenold operated switches or controlling the electromotive force of said generator.

38. A motor control system comprising a generator, a motor the armature of which is exclusively supplied bysaid generator, solen' oid operated switches for controlling the electromotive force of said generator, and remote means for controlling said switches.

39. A motor control system comprising 'a motor, a generator supplying the armature thereof, and solenoid operated switches for controlling the electromotive force of said generator and the field strength of the motor. v

- 40. A` motor control system comprising a motor, a generator .supplying the armature thereof, and solenoid operated switches for controllingthe electromotive'force of said generator and varying and reversing the field of the motor. 41. A motor control system comprisinga motor, a generator supplying the armature thereof, solenoid operated switches for.con'

trolling the elctromotive force of said generator and the field strength of the motor and remote means for controlling said switches.

42. A motor control system comprising a generator, a motor supplied thereby, solenoid V operated switches for controlling t e electrom'otive force of said enerator and v 'ng and reversing the iiel of the motor,'an remote'means for controlling said switches.

; 43., A motor control system comprising a generator, a motor the armature of which is exclusively supplied by said generator, and

solenoid operated switches for controlling the .field strength of said generator.

44. A motor control system comprisin a generator, a motor the armature of whic is exclusively supplied by s'a1d generator, solenoid operated switches for-controlling the field strength of said generator, and remotev means for controlling said switches.V

45. A motor control system comprising a` motor, a generator supplying the armature thereoffand solenoid operated switches for controlling the fieldstrengths of the generator and motor.

In testimony whereof I affix my signature, l .I

in the presence of two witnesses.

.WALTER J RICHARDS.

Witnesses:

Gno. B. SCHLEY, FREDv J. KINsEY. 

